House : North American Convolvulaceae 503 



of other species, L e., he changed the name of the species in the 

 second edition of the Species Plantarum from that of the first 

 edition. The two Linnaean names are shown to be synonymous 

 by the same pre-Linnaean citations given under both. 



In addition to the fifteen species of North America the follow- 

 ing two species are found on the western coast of tropical South 

 America and may occur in Central America : 



Operculina ampliata (Choisy) 



Ipomoca ampliata Choisy, in DC. Prodr. 9: 361. 1845. 

 Type locality : u Campeche, ins. oceani Pacifici." 



Operculina codonantha (Benth.) 



Ipomoea c oiio nan t/i a Benth. PI. Hartw. 120. 1843. 

 Type locality : " In sylvis prope Guayaquil. M 



1 



Species inquirendae 



Operculina Pavoni Hallier f. Bot. Jahrb. 16 1550. 1 893. 4 ' Nova 



Hispania ; Pavon, in herb. Boiss. 



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